Edwabd bostock



(MddeL) E. BOSTOGK. TUGK GREASER 1-"011- SEWING MAGHINES.

No; 295.975, Patented Ap r. 1,1884.

u, warms PhoioLAhognpMr. Walhingim ma STATES Nrrn Aren't TUCK-CREASERFOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 295,975, dated April 1,1884.

Application filed July 14, 1883. (Model) To all wiwm it may concern.-

Be it known that I, EDWARD Bos'roorr, a

.citizen of the United States, residing in the city, county, and Stateof New York, have invented certain new and useful Improvements inTuck-Oreasers for Sewing-Machines; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, sufficient toenable any person skilled in the same.

The object of my present invention is to conthe art to use strnct avibrating tuck-creaser which fits all ing-machine, addingappreciablytothe weight sewing-machines equally well without change in itsarrangement, is operated independently of the needle-bar, andby whichthe pressure of the upper creaser can be regulated on the work for lightor heavy material.

I The principal tuck-creasers in use at the present time are operated bya vibrating arm which is attached to the needle-bar of a sewof runningthe same, having a tendency to cause skip stitches and break the thread,

giving unnecessary pressure, (which cannot be regulated,) especially onlight and delicate fabricssuch as organdie. or nainsook muslinsandbeingnoisy and liable to get out of order 13 3 follows:

or break.

The drawings accompanying this specification and forming part thereofare described as Figure 1 represents myimproved tuck-creaser inperspective as applied to a sewing-machine. Fig. 2 is a verticallongitudinal sec tion of the same; and Fig. 3 is a detail View, showingthe manner in which the upper mark- .ing-arm is attached to thepresser-bar of the machine.

. Similar letters denote similar parts in all of the figures. p

In Fig. 1, A Ais the main plate, shaped as shown, along the top of theinner edge of which 1 length, for the gage to slide upon.

is firmly attached a piece of wire its entire In place of a wire, theinner edge may be turned up or I corrugated. The left-hand edge of thisplate is turned up at J, to press the cloth into the groove of the uppercreaser, and the righthand end is turned up at It, to which the uppermarking-arm is hinged at I. I

B is a flat metal plate, secured to A A at each end in such manner as toadmit of a space between it and the lower plate, along which the slottedclamp slides. On the upper surface of. this plate is a graduated scalefor ad j usting width of space to the left of the needle.

parallel with the corrugation is a thin tongue,

F, projecting over the inner edge of main plate. On the upper surface ofthis tongue is a grad uated scale in parts of an inch, for gaging thewidth of tuck to the right of the needle.

I) is a slotted clamp, which straddles plate A A, and has a downwardprojection, N, which slides along the front edge of plateAA. Near itscenter, at right angles from its slot, it is corrugated to slide alongover the corrugation on C G. The set-screw E, belonging tothesewing-machine, passing through the slot of D, serves to clamp plateA A and gage 0 0 securely to the bed-plate of any sewing-machine inproper position for use.

G is a metal arm, made preferably of steel, which is hinged to theright-hand end of A A at 1 Its left-hand end is bent at right angles, towhich is attached in proper position to center over the edge of thelower creaser a grooved wheel, H.

L is a metal clamp, which is screwed firmly to the pressenbar S.

K is a thin metal bar, shaped substantially as shown, the lower end ofwhich is attached to and slides along the arm G. The upper part of Kisslotted its entire length, and is secured firmly to the presser-bar byscrew M and clamp L. This slot admits of adjustment in any position,besides regulatingthe degree of pressure of the upper creaser on thework, and, in connection with the slot intclamp D, admits of adjustingthe entire apparatus backward or forward, as well'as lengthwise of themachine. The importance of this arrangement is manifest, as by its meansthe same creaser can be made to fit any sewing-ma chine-a feature whichit is believed has not been attained in any Vibrating tuck-creaserhitherto made.

I do not confine myself to the use of a grooved wheel on the end of theupper marking-arm, as I might employ a stationary notch or any otherequivalent device; but I have preferably chosen a grooved wheel forseveral reasons, the most important of which is that the lateral playfrom the axis to its periphery is more liable to center the groove overthe edge of the lower creaser.

Instead of turning up the main plate at R, I may attach to said plate anupright metal post slotted at the upper end to receive the arm G.

The manner of attaching my improved tuckcreaser to the machine is asfollows: Let the presser-bar down and raise the needlebar to its highestpoint, pass the hinged arm under the needle, and screw the clamp to thepresser-bar, with the wheel resting on the lower creaser, as when thefeed takes place the presser-bar raises the upper oreaser sufficientlyto admit of the work passing freely along. The arm can be raised orlowered by the slot of K and screw llI.

It is well known to all who are familiar with sewing machines of variouskinds now in use that the screw-hole in the bed-plate of the machine issituated in different positions on different machines relative to thepoint where the stitching and feeding take place, and as almost alltuck-markers are held in position on the machine by means ofathumb-scrcw in such screw-hole, I will explain the advantages of mypresent invention with reference thereto. 'Also, as the presser-bar ofsome machines is located at a greater distance back of the needle andfrom the point of stitching and feeding than in others, and it beingessential that the point of creasing be as near as possible oppositetothe needle and feed,in order toadapt avibrating tuck-marker for use011 different machines, it is absolutely necessary to provide foradjusting the same backward or forward on the machine in such mannerthat whatever the position of the screw-hole in the bed of the machine,and whatever may be the position of the presser-bar relatively to thepoint of stitching and feeding, the tuck-marker may be so adjusted as tolocate the creasingpoints opposite to the needle, which can be done withthe slotted bar K, (constructed substantially as herein shown anddescribed,) connecting the upper creasing-arm, G, with the presser-barS,

mits of adjusting the entire apparatus in any direction, so that thesame tuck-marker will fit all machines.

Having now fully described my invention, what I claim as new, and desireto secure by Letters Patent, is as follows:

1. The main plate A, having two lateral arms, one of which bears thecreasing-blade J, and the creasing-arm G, pivoted at its rear end to theother arm of plate A, and bearing at its front end-the creasing-rollerH, in combination with the clamp D,provided with the slot, as shown,adapted to clamp the plate A to the bed-plate of a sewing-machine insuch a manner that the said plate can be adjusted longitudinally beneaththe clamp, and means for connecting the creaser-arm to the presserbar,substantially as shown and described.

2. The main plate A, having two lateral arms, one of which bears thecreasing-blade J, and the creasing-arm Gr, pivoted at its rear end tothe other arm of plate A, and bearing at its front end thecreasing-roller H, in combination with the clamp D, slotted as shown,adapted to clamp the plate A to the bed-plate of a sewing-machine insuch a manner that saidplate can be longitudinally adjusted beneath theclamp, and the slotted bar K and set-. screw M, substantially as setforth.

EDVARD BOSTOCK.

Witnesses:

CHARLES BLONDEL, J12, HENRY G. GABAY.

